"Steven P. McNicoll" wrote:


"BUFDRVR" wrote in message
...

Interesting. I did not know that.


Probably few do. About fifteen years ago I was a controller at Chicago
Center working traffic in the Madison, WI, area. A NASA ER-1 departed MSN
requesting an unrestricted climb to FL610. I coordinated with the high
altitude sector and issued the climb. He went up like a rocket! The Mode C
readout couldn't keep up with him. Shortly after he reported out of FL600
and cancelled IFR, the Mode C read FL600. I asked a Data Systems Specialist
about it and he told me that FL600 and higher will read out as FL600.


Sounds like another 'mechanic to pilot answer' "That's the way
it's made sir"

(just kidding)
--

-Gord.